Polyvinyl aldehyde and polyvinyl acetate resins plasticized with 1,5-pentanediol bis-cyclohexylacetate



, Patented Aug. 5, 1952 POLYVINYL ALDEHYDE AND POLYVINYL ACETATE RESINSPLASTICIZED WITH 1,5- PENTANEDIOL BIS -CYCLOHEXYLACETATE Stanford J.Hetzel, Cheltenham, Pa., assignor to Sun Oil Company, Philadelphia, Pa.,a corporation of New Jersey No Drawing. Application December 30, 1949,Serial No. 136,142

4 Claims.

This invention relates to plasticized polyvinyl aldehyde and polyvinylacetate resin compositions, and to the use of 1,5-pentanediolbis-cyclohexylacetate as plasticizer in such compositions.

1,5-pentanediol bis-cyclohexylacetate is disclosed and claimed inapplicants copending application Serial No. 46,182, filed August 25,1948, now U. S. Patent 2,500,033, issued March '7, 1950. The producttherein described is a colorless to amber oillike material having aboiling point at 5 mm. Hg of about 210 C.-216 C., a refractive index Nof 1.4726, and a density of D4 of 1.0073. Polyvinyl chlorideresinsplasticized with 1,5-pentanediol bis-cyclohexylacetate aredisclosed and claimed in applicant's copending application Serial No.46,187, filed August 25, 1948, now U. S. Patent 2,504,929 issued April18, 1950.

According to the present invention, 1,5-pentanediolbis-cyclohexylacetate is compounded with a resin selected from the groupconsisting of polyvinyl acetal, polyvinyl butyral, and polyvinyl acetateresins to form a composition comprising the resin plasticized with1,5-pentanediol biscyclohexylacetate.

The following examples illustrate the invention:

Example I 80 parts by weight of resin, known commercially as VinyliteAYAF and consisting essentially of polyvinyl acetate, were fused on a 3x 8 rubber mill, whose rolls were heated to 220-230 F. About 20 parts of1,5-pentanediol bis-cyclohexylacetate as plastioizer and about 1 part ofmagnesium stearate as lubricant were added to the fused resin. The resinand ester blended to form a homogeneous mixture. The mixture was sheetedofi at l75190 F. to give a plastic sheet having satisfactory tensilestrength, odor, and appearance, and flexibility substantially increasedover that of the unplasticized resin.

Example II 40 parts by weight of a polyvinyl butyral resin knowncommercially as Vinylite XYSG were mixed together with about 60 parts byweight of 1,5-pentanedio1 bis-cyclohexylacetate and about 1 part ofmagnesium stearate. The mixture was then fused on a 3 x 8" rubber millwhose rolls were heated to about 250 F. The resin and ester blended toform a homogeneous mixture. The mixture sheeted off to give a plasticsheet having increased flexibility and satisfactory tensile strength,odor and appearance.

The above examples show that 1,5-pentanediol dibenzoate, in proportionsuflicient to plasticize the resin, is compatible with polyvinyl acetateand polyvinyl butyral resin. The ester and resin may be compoundedaccording to methods as practiced in the arts relating to the respectiveresins.

Polyvinyl acetal-and polyvinyl butyral resins, where referred to in thepresent specification, are intended to indicate resinous materialsobtained by reacting hydrolyzed polyvinyl acetate resin withacetaldehyde and butyraldehyde respectively in the manner well known inthe art for preparation of such polyvinyl aldehyde resins, the ratio ofthe acetal portion of such resinous materials to the unconverted acetyland hydroxyl portions thereof being of substantial magnitude andgenerally at least about one.

I claim:

1. A composition comprising a'resin selected from the group consistingof polyvinyl acetal, polyvinyl butyral, and polyvinyl acetate resins,said resin plasticized with 1,5-pentanediol biscyclohexylacetate.

2. Composition according to claim 1 wherein said resin is a polyvinylbutyral resin.

3. Composition according to claim 1 wherein said resin is a polyvinylacetate resin.

4. Composition according to claim 1 wherein said resin is a polyvinylacetal resin.

STANFORD J. I-IETZEL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,339,387 Endres Jan. 18, 19442,504,929 Hetzel Apr. 18, 1950

1. A COMPOSITION COMPRISING A RESIN SELECTED FROM THE GROUP CONSISTINGOF POLYVINYL ACETAL, POLYVINYL BUTYRAL, AND POLYVINYL ACETATE RESINS,SAID RESIN PLASTICIZED WITH 1,5-PENTANEDIOL BISCYCLOHEXYLACETATE.